Optical mechanism and optical system

ABSTRACT

An optical mechanism is provided. The optical mechanism includes an immovable part, a movable part, and a drive assembly. The movable part is connected to an optical element. The movable part is movable relative to the immovable part. The drive assembly drives the movable part to move relative to the immovable part. The immovable part includes a frame. The frame includes a receiving space receiving the movable part.

CROSS REFERENCE TO RELATED APPLICATIONS

This application claims the benefit of U.S. Provisional Application No.63/104,118, filed on Oct. 22, 2020, the entirety of which s incorporatedby reference herein.

BACKGROUND OF THE INVENTION Field of the Invention

The present invention relates to a drive mechanism, and in particular,to an optical mechanism.

Description of the Related Art

As technology has developed, many electronic devices (such as tabletcomputers and smartphones) may be used for capturing images andrecording video. The optical element and the optical mechanism in theelectronic device allow the user to use the electronic device to captureimages and record video. When the electronic device is being used, shockor vibration may occur, and this may cause the images or video to comeout blurry. Therefore, demand for higher quality images and video isincreasing.

BRIEF SUMMARY OF THE INVENTION

An optical mechanism is provided. The optical mechanism includes animmovable part, a movable part, and a drive assembly. The movable partis connected to an optical element. The movable part is movable relativeto the immovable part. The drive assembly drives the movable part tomove relative to the immovable part. The immovable part includes aframe. The frame includes a receiving space receiving the movable part.

In some embodiments, the optical mechanism further includes a guidanceassembly guiding the movable part to move along a first axis. Theguidance assembly includes a magnetically-permeable element, a firstmagnetic element, and a second magnetic element. Themagnetically-permeable element has a magnetically-permeable material.The first magnetic element includes a first pair of magnetic poles. Thefirst pair of magnetic poles includes a north magnetic pole and a southmagnetic pole that are arranged along a second axis. The first magneticelement includes a first magnetic element surface that faces themagnetically-permeable element, and the first magnetic element surfaceis perpendicular to the second axis. The second magnetic elementincludes a second pair of magnetic poles. The second pair of magneticpoles includes a north magnetic pole and a south magnetic pole that arearranged along the second axis. The second magnetic element includes asecond magnetic element surface that faces the magnetically-permeableelement, and the second magnetic element surface is perpendicular to thesecond axis. The arrangement direction of the north magnetic pole andthe south magnetic pole of the first pair of magnetic poles is oppositeto the arrangement direction of the north magnetic pole and the southmagnetic pole of the second pair of magnetic poles.

In some embodiments, the frame includes a plastic material, themagnetically-permeable element is immovably disposed on the frame, andat least part of the magnetically-permeable element is embedded in theframe and not revealed from the frame. In some embodiments, the frameincludes a fixing element affixing the magnetically-permeable element.The magnetically-permeable element includes an opening corresponding tothe fixing element, the magnetically-permeable element includes amagnetically-permeable element surface facing the first magneticelement, and the magnetically-permeable element surface is revealed fromthe frame.

In some embodiments, the drive assembly includes a first drive element,a first clamping portion, and a second clamping portion. The first driveelement includes a shape memory alloy material and an elongatedstructure. The first clamping portion affixes a first end of the firstdrive element. The second clamping portion affixes a second end of thefirst drive element. The magnetically-permeable element surface of themagnetically-permeable element faces the first drive element, and thefirst drive element is located between the magnetically-permeableelement surface of the magnetically-permeable element and the firstmagnetic element surface of the first magnetic element. In someembodiments, the drive assembly further includes a second drive element,and the second drive element includes a shape memory alloy material andan elongated structure. In some embodiments, the first drive element isV-shaped and the second drive element is reverse-V-shaped.

In some embodiments, the immovable part further includes a bottomimmovably connected to the frame, and the bottom includes a first bottomsurface, a second bottom surface, a first opening, a second opening, anda third opening. The first bottom surface faces the frame andperpendicular to the first axis. The second bottom surface faces adirection that is opposite to which the first bottom surface faces. Thesecond bottom surface and a first direction face in opposite directions.When viewed from the first direction, at least part of the firstclamping portion is revealed from the first opening. When viewed fromthe first direction, at least part of the first drive element isrevealed from the second opening. When viewed from the first direction,at least part of the second clamping portion is revealed from the thirdopening. In a direction that is perpendicular to the first bottomsurface, the second bottom surface and the drive assembly at leastpartially overlap. When viewed from the first direction, the secondopening is located between the first opening and the third opening.

In some embodiments, the guidance assembly further includes a firstguidance element, a first receiving portion, a second receiving portion,and a third receiving portion. The first guidance element has anelongated structure extending along the first axis. The first receivingportion has a concave structure corresponding to the first guidanceelement. The second receiving portion has a concave structurecorresponding to the first guidance element and extends along the firstaxis. The third receiving portion has a concave structure correspondingto the first guidance element and extends along the first axis. Thefirst receiving portion and the second receiving portion are arrangedalong the second axis, and the second receiving portion and the thirdreceiving portion are arranged along the first axis. In someembodiments, the minimum distance between the second receiving portionand the first guidance element is less than the minimum distance betweenthe third receiving portion and the first guidance element. In someembodiments, the minimum distance between the first magnetic element andthe magnetically-permeable element in the second axis is less than theminimum distance between the first guidance element and themagnetically-permeable element in the second axis. In some embodiments,the immovable part further includes a bottom immovably connected to theframe, the first receiving portion is immovably disposed on the movablepart, the second receiving portion is immovably disposed on the bottom,and the third receiving portion is immovably disposed on the frame.

In some embodiments, the optical mechanism further includes a firstadhesive element. The first guidance element is immovably connected tothe second receiving portion via the first adhesive element, and thefirst adhesive element is in direct contact with the frame and thebottom. The second receiving portion and the third receiving portionhaving a second receiving portion recess and a third receiving portionrecess, respectively, and when viewed from the first axis, the thirdreceiving portion recess and the bottom at least partially overlap. Insome embodiments, the second receiving portion includes a secondreceiving portion overflow-proof structure receiving at least part ofthe first adhesive element, and when viewed from the first axis, thesecond receiving portion overflow-proof structure is close to the secondreceiving portion recess. The third receiving portion includes a thirdreceiving portion overflow-proof structure receiving at least part ofthe first adhesive element, and when viewed from the first axis, thethird receiving portion overflow-proof structure is close to the thirdreceiving portion recess, wherein when viewed from the first axis, thesecond receiving portion overflow-proof structure and the thirdreceiving portion overflow-proof structure at least partially overlap.

In some embodiments, the guidance assembly further includes a secondguidance element, a fourth receiving portion, a fifth receiving portion,and a sixth receiving portion. The second guidance element has anelongated structure extending along the first axis. The fourth receivingportion has a concave structure corresponding to the second guidanceelement. The fifth receiving portion has a concave structurecorresponding to the second guidance element and extends along the firstaxis. The sixth receiving portion has a concave structure correspondingto the second guidance element and extends along the first axis. Theminimum distance between the fifth receiving portion and the secondguidance element is less than the minimum distance between the sixthreceiving portion and the second guidance element. In some embodiments,the fourth receiving portion is immovably disposed on the movable part,the fifth receiving portion is immovably disposed on the bottom, and thesixth receiving portion is immovably disposed on the frame. In someembodiments, the optical mechanism further includes a second adhesiveelement. The second guidance element is immovably connected to the fifthreceiving portion via the second adhesive element. In some embodiments,when viewed from the first axis, the first receiving portion and thefourth receiving portion have different structures. The fourth receivingportion includes a guidance surface facing the second guidance element,the guidance surface is a flat surface, the guidance surface is incontact with the second guidance element, and the guidance surface isperpendicular to the second axis. In some embodiments, the firstreceiving portion is V-shaped, and the fourth receiving portion isU-shaped.

An optical system including an optical mechanism is provided. Whenviewed from a direction of an incident light, the movable part iscompletely revealed from the immovable part. The optical system includesa case, a base, and a drive module. The case has a top wall and a sidewall. The top wall is not parallel with the side wall, and the top wallrestricts movement range of the movable part. An accommodating spaceaccommodating the optical mechanism is formed by the case and the base.The drive module drives the optical mechanism to move relative to thecase.

BRIEF DESCRIPTION OF THE DRAWINGS

The present invention can be more fully understood by reading thesubsequent detailed description and examples with references made to theaccompanying drawings, wherein:

FIG. 1 is a schematic view of the electronic device, the opticalelement, and the optical mechanism.

FIG. 2 is a schematic view of the optical element and the opticalmechanism.

FIG. 3 is an exploded view of the optical mechanism.

FIG. 4 is a top view of the optical mechanism.

FIG. 5 is a bottom view of the optical mechanism.

FIG. 6 to FIG. 9 are perspective views of the optical mechanism, inwhich the perspectives and the omitted elements are not exactly thesame.

FIG. 10 is a schematic view of the frame and the strengthening element.

FIG. 11 is a schematic view of the bottom and the second circuitassembly.

FIG. 12 is a perspective view of the holder.

FIG. 13 and FIG. 14 are schematic views of the drive assembly and theguidance assembly from different perspectives.

FIG. 15 to FIG. 18 are enlarged views of part of the optical mechanism,in which the perspectives and the omitted elements are not exactly thesame.

FIG. 19 and FIG. 20 are cross-sectional views of the optical mechanismtaken along the line A-A and the line B-B of FIG. 6 , respectively.

FIG. 21 and FIG. 22 are perspective views of the optical mechanism, inwhich the omitted elements are not exactly the same.

FIG. 23 is an enlarged view of part of the optical mechanism.

FIG. 24 is a cross-sectional view of the optical mechanism taken alongthe line C-C of FIG. 6 .

DETAILED DESCRIPTION OF THE INVENTION

The following disclosure provides many different embodiments, orexamples, for implementing different features of the subject matterprovided. Specific examples of components and arrangements are describedbelow to simplify this disclosure. These are, of course, merely examplesand are not intended to be limiting. For example, the formation of afirst feature “on” and/or “above” a second feature in the descriptionthat follows may include embodiments in which the first and secondfeatures are formed in direct contact, and may also include embodimentsin which additional features may be formed between the first and secondfeatures, so that the first and second features may not be in directcontact. The spatially relative terms are intended to encompassdifferent orientations of the device in use or operation in addition tothe orientation depicted in figures. The apparatus may be otherwiseoriented (rotated 90 degrees or at other orientations) and the spatiallyrelative descriptors used herein may likewise be interpretedaccordingly. In addition, in different examples of this disclosure,symbols or alphabets may be used repeatedly.

Ordinal terms such as “first”, “second”, etc., used in the descriptionand in claims do not by themselves connote any priority, precedence, ororder of one element over another, but are used merely as labels todistinguish one element from another element having the same name.Unless the context requires otherwise, throughout the specification andclaims that follow, the word “include”, “have” and variations thereof,such as “includes”, “including”, “having” are to be construed in anopen, inclusive sense, that is, as “including, but not limited to.”

Please refer to FIG. 1 and FIG. 2 . FIG. 1 is a schematic view of anelectronic device 1, an optical element 10, and an optical system 20.FIG. 2 is a schematic view of the optical element 10 and the opticalsystem 20. The electronic device 1 may be a tablet computer, asmartphone, etc. The optical element 10 may be a lens. The opticalelement 10 may be made of plastic or glass. The optical element 10 maybe circular or it may have another shape. The optical element 10 and theoptical system 20 may be disposed in the electronic device 1, so that auser may capture images and record video. The optical system 20 may holdthe optical element 10 and drive the optical element 10 to move, so asto adjust the position of the optical element 10 to capture clearimages. The optical element 10 and the optical system 20 are typicallyplaced in the top region of the electronic device 1 to increase thedisplay area of the electronic device 1.

The optical element 10 has an optical axis O. The optical axis O is animaginary axis passing through the center of the optical element 10.When the optical element 10 and the optical system 20 are aligned, theoptical axis O substantially overlaps the central axis of the opticalsystem 20. Therefore, in the followings and in the drawings, the opticalaxis O of the optical element 10 may be used to illustrate or describethe related features of the optical system 20. It should be noted that,since the optical element 10 is movably placed in the optical system 20,the optical axis O may be not exactly overlap the central axis of theoptical system 20 because of the movement, shake, rotation, tilt of theoptical system 20. The optical system 20 may be connected to an externalmodule, such as an image sensor module (e.g. a module that includes acharge-coupled detector (CCD)), so that the light entering the opticalsystem 20 may be converted into an image on the external module.

Next, please refer to FIG. 3 . FIG. 3 is an exploded view of the opticalsystem 20. The optical system 20 includes a case 21, a base 22, drivemodule 23, and an optical mechanism 100. The case 21 and the base 22 arearranged along the optical axis O, and an accommodating spaceaccommodating the optical mechanism 100 is formed by the case 21 and thebase 22. The case 21 has a top wall 21T and four side walls 21S. The topwall 21T is perpendicular to the optical axis O. The side walls 21Sextend in a direction that is parallel with the optical axis O from theedge of the top wall 21T. Compared to the base 22, the top wall 21T ofthe case 21 is closer to the incident light. The top wall 21T and thebase 22 restrict the movement range of the optical mechanism 100.

The drive module 23 is located between the case 21 and the base 22, andthe drive module 23 drives the optical mechanism 100 to move along adirection that is perpendicular to the optical axis O. The drive module23 includes a main body 23B and four drive elements 23D. The main body23 may further be divided into a first main body portion 23B1 and asecond main body portion 23B2. In detail, the optical mechanism 100 islocated on the first main body portion 23B1, and the second main bodyportion 23B2 is located on the base 22. The drive elements 21D aredisposed on the first main body portion 23B1 and the second main bodyportion 23B2, and the drive elements 23D are connected to the first mainbody portion 23B1 and the second main body portion 23B2. In thisembodiment, when viewed from the optical axis O, the four drive elements23D do not cross or overlap each other. Additionally, the four driveelements 23D are symmetrically arranged. However, the drive elements 23Dmay not be symmetrically arranged if any deviation is produced duringassembling. The drive elements 23D may be made of shape memory alloy(SMA), including an iron-based alloy, a copper-based alloy (for example,copper-zinc-aluminum alloy, copper-aluminum-nickel alloy), atitanium-nickel alloy, a titanium-palladium alloy, atitanium-nickel-copper alloy, a titanium-nickel-palladium alloy, agold-cadmium alloy, a thallium-indium alloy or combination of anyabove-described shape memory alloy.

The shape memory alloy deforms when the temperature changes. Therefore,drive signal (e.g. current, voltage) may be applied to the four driveelements 23D by a power source. The driving signals may be the same ordifferent. The temperature of the four drive elements 23D are controlledrespectively, and the lengths of the four drive elements 23D are changedrespectively. The lengths of the four drive elements 23D may be changedidentically or differently. For example, when the drive signal isapplied to the drive elements 23D to make the temperature of the driveelements 23D change, the drive elements 23D are lengthened or shortenedto make the first main body portion 23B1 and the optical mechanism 100on the first main body portion 23B1 move. Therefore, the positionalrelationship between the optical mechanism 100 and the case 21 ischanged. When stopping applying drive signal, the drive elements 23D maybe restored to their original lengths due to the characteristics of theshape memory alloy.

Next, in addition to FIG. 3 , please also refer to FIG. 4 to FIG. 9 .FIG. 4 is a top view of the optical mechanism 100. FIG. 5 is a bottomview of the optical mechanism 100, FIG. 6 to FIG. 9 are perspectiveviews of the optical mechanism 100, in which the perspectives and theomitted elements are not exactly the same. When viewed from the opticalaxis O, the optical mechanism 100 is polygonal, such as quadrilateral.For ease of illustration, the four sides of the optical mechanism 100are defined as a first side 1001, a second side 1002, a third side 1003,and a fourth side 1004, respectively. The first side 1001 is opposite tothe third side 1003, and the second side 1002 is opposite to the fourthside 1004. The first side 1001 is substantially parallel with the thirdside 1003, and the second side 1002 is substantially parallel with thefourth side 1004. The first side 1001, the second side 1002, the thirdside 1003, and the fourth side 1004 are substantially perpendicular to afirst axis A1. When viewed from the first axis A1, the second side 1002and the fourth side 1004 are substantially perpendicular to a secondaxis A2, and the second side 1002 and the fourth side 1004 extend alongthe second axis A2. When viewed from the first axis A1, the first side1001 and the third side 1003 are substantially perpendicular to a thirdaxis A3, and the first side 1001 and the third side 1003 extend alongthe third axis A3.

The optical mechanism 100 includes an immovable part I, a movable partM, a drive assembly D, a guidance assembly G, a first circuit assemblyC1, a second circuit assembly C2 (please refer to FIG. 11 and FIG. 22 ),a sensing assembly S, and a control assembly C. The movable part M isconnected to the optical element 10. The movable part M is movablerelative to the immovable part I. The drive assembly D drives themovable part M to move relative to the immovable part I along the s axisA1. The first axis A1 is substantially parallel with the optical axis O.The guidance assembly G may guide the movement of the movable part Mrelative to the immovable part I. The current may be supplied andtransmitted by the first circuit assembly C1 and the second circuitassembly C2. The sensing assembly S may detect the movement of themovable part M relative to the immovable part I. The control assembly Cmay control the drive assembly D. The description in the presentdisclosure is merely an example, and the elements may be added to orremoved as needed. Also, for clear illustration, some elements may beomitted in the drawings.

In this embodiment, the immovable part I includes a frame 110 and abottom 120. The movable part M includes a holder 130. The drive assemblyD includes a first drive element 140, a second drive element 150, twofirst drive element fixing elements 160, two second drive element fixingelements 170, a first contact element 180, and a second contact element190. The guidance assembly includes a magnetically-permeable element200, a first magnetic element 210, a second magnetic element 220, afirst guidance element 230, a second guidance element 240. The firstcircuit assembly C1 includes a plurality of first circuits 250. Thesecond circuit assembly C2 includes a plurality of second circuits 260(please refer to FIG. 11 and FIG. 22 ). The sensing assembly S includesa reference element 270 and a sensing element 280 corresponding to thereference element 270. The control assembly C includes a first controlunit 290 and a second control unit 300, the sensing element 280 and thefirst control unit 290 may be packaged in a first package 310, and thesecond control unit may be packaged in a second package 320. In someembodiments, the optical mechanism 100 further includes a strengtheningelement 330 (please refer to FIG. 10 ) and an external connectionterminal 340 (please refer to FIG. 11 and FIG. 22 ).

Next, in addition to FIG. 3 to FIG. 9 , please also refer to FIG. 10 andFIG. 11 to know the immovable part I. FIG. 10 is a schematic view of theframe 110 and the strengthening element 330. FIG. 11 is a schematic viewof the bottom 120 and the second circuit assembly C2. The frame 110 isdisposed above the bottom 120. The frame 110 may be immovably connectedto the bottom 120. The frame 110 has a receiving space that receives themovable part M. In detail, the movable part M, the drive assembly D, theguidance assembly E1, the first circuit assembly C1, and the secondcircuit assembly C2 may be disposed between the frame 110 an the bottom120.

In some embodiments, the frame 110 includes a plastic material, and thestrengthening element 330 includes a metal material. The strengtheningelement 330 may be formed in the frame 110 by methods such as insertmolding. At least part of the strengthening element 330 is embedded andnot revealed from the frame 110. The strengthening element 330strengthens the mechanical strength of the frame. In addition, thestrengthening element 330 may include one or more perforation 331. Whenthe frame 110 and the strengthening element 330 are formed, some meltedplastic that is part of the frame 110 may fill the perforation 331 ofthe strengthening element 330 under high temperature. Therefore, thecontact area between the frame 110 and the strengthening element 330 isincreased, and thus the connection between the frame 110 and thestrengthening element 330 is strengthened. It should be noted that,there is a gap between the strengthening element 330 and themagnetically-permeable element 200, so short circuits are prevented.

In some embodiments, the bottom 120 includes a plastic material, and thesecond circuits 260 of the second circuit assembly C2 include a metalmaterial. The second circuits 260 of the second circuit assembly C2 maybe formed in the bottom 120 by methods such as insert molding. At leastpart of the second circuits 260 are embedded and not revealed from thebottom 120.

Next, in addition to FIG. 3 to FIG. 9 , please also refer to FIG. 12 toknow the movable part M. FIG. 12 is a perspective view of the holder130. When viewed from the direction of the incident light, the movablepart M is completely revealed from the immovable part I. In other words,when viewed from the direction of the incident light, the holder 130 isnot blocked by the frame 110 and the bottom 120. The holder 130 is notin direct contact with the frame 110 and the bottom 120. The holder 130is hollow for holding the optical element 10. In some embodiments, theholder 130 is made of a plastic material.

The holder 130 may include a first magnetic element receiving portion131, a second magnetic element receiving portion 132, and a referenceelement receiving portion 133. The first magnetic element receivingportion 131, the second magnetic element receiving portion 132, and thereference element receiving portion 133 are located on the top surfaceof the holder 130. The first magnetic element receiving portion 131 andthe second magnetic element receiving portion 132 are located on thefirst side 1001, and the reference element receiving portion 133 islocated on the second side 1002. The first magnetic element receivingportion 131, the second magnetic element receiving portion 132, and thereference element receiving portion 133 receive the first magneticelement 210, the second magnetic element 220, and the reference element270, respectively. In some embodiments, the first magnetic elementreceiving portion 131, the second magnetic element receiving portion132, and the reference element receiving portion 133 are recesses.

To prevent the holder 130 from being damaged when the movement of theholder 130 reaches the limit, the holder 130 may include one or morestoppers. In this embodiment, the holder 130 includes a plurality ofupper stoppers 134. The upper stoppers 134 protrude from the top surfaceof the holder 130. In particular, the upper stoppers 134 are closer tothe top wall 21T of the case 21 than the top surface of the holder 130.The upper stoppers 134 may restrict the movement range of the holder130. For example, when the holder 130 moves toward the top wall 21T ofthe case 21 and reaches the limit, the upper stoppers 134 of the holder130 may be in contact with the top wall 21T of the case 21.

Next, in addition to FIG. 3 to FIG. 9 , please also refer to FIG. 13 andFIG. 14 to know the drive assembly D and the guidance assembly G FIG. 13and FIG. 14 are schematic views of the drive assembly D and the guidanceassembly G from different perspectives. When viewed from the first axisA1 the drive assembly D and the guidance assembly G are located on thefirst side 1001.

The first drive element 140 and the second drive element 150 both haveelongated structures, but they have different configuration. Forexample, the shape of the first drive element 140 is different from thatof the second drive element 150. In this embodiment, the first driveelement 140 is V-shaped and the second drive element 150 isreverse-V-shaped. The first drive element 140 and the second driveelement 150 may be made of SMA, and they may include similar or the samematerial of the drive elements 23D. The first drive element fixingelement 160 includes a first clamping portion 161 fixing the first endof the first drive element 140 and a second clamping portion 162 fixingthe second end of the first drive element 140. The second drive elementfixing element 170 may also include clamping structures for fixing theends of the second drive element 150. The configuration may facilitateheat dissipation. In addition, one or more holes 163 and 173 may beformed around the first drive element fixing element 160 and the seconddrive element fixing element 170 to further facilitate heat dissipationof the first drive element 140 and the second drive element 150. Itshould be noted that, the holes 163 and 173 may be slightly far awayfrom the first drive element 140 and the second drive element 150 toprevent excessive loss of the energy for driving the first drive element140 and the second drive element 150.

The two ends of the first drive element 140 and the second drive element150 are fixed, and the central region of the first drive element 140 andthe second drive element 150 is in direct contact with the first contactelement 180 and the second contact element 190, respectively. When thedrive signal (e.g. the current or the voltage) is applied to the firstdrive element 140 and the second drive element 150, the lengths of thefirst drive element 140 and the second drive element 150 may becontrolled. For example, when the length of the first drive element 140is shortened, the holder 130 may be driven to move toward the top wall21T of the case 21 (upwardly) along the first axis A1 via the firstcontact element 180 that is in direct contact with the first driveelement 140 and the holder 130. Also, when the length of the seconddrive element 150 is shortened, the holder 130 may be driven to movetoward the base 22 (downwardly) along the first axis A1 via the secondcontact element 180 that is in direct contact with the second driveelement 150 and the holder 130.

The guidance assembly G may guide the movable part M to move relative tothe immovable part I along the first axis A1. The magnetically-permeableelement 200 is immovably disposed in the frame 110. The frame 110 mayinclude a fixing element 115 (please refer to FIG. 10 ) fixing themagnetically-permeable element 200. The magnetically-permeable element200 includes an opening 201 corresponding to the fixing element 115 ofthe frame 110 to strengthen the connection between themagnetically-permeable element 200 and the frame 110. Also, the opening201 may be irregular shaped, such as polygonal with inclined sides, tofurther increase the contact area between the magnetically-permeableelement 200 and the frame 110 to strengthen the connection between themagnetically-permeable element 200 and the frame 110. Furthermore, themagnetically-permeable element 200 may include an engagement portion202, so that the magnetically-permeable element 200 may be better fixedto the fixing element 115 of the frame 110. At least part of themagnetically-permeable element 200 is embedded and not revealed from theframe 110. In some embodiments, the engagement portion 202 is revealedfrom the frame 110 (as shown in FIG. 7 ).

The magnetically-permeable element 200 includes a magnetically-permeableelement surface 205 facing the first drive element 140 and the firstmagnetic element 210. In particular, the first drive element 140 islocated between the magnetically-permeable element surface 205 of themagnetically-permeable element 200 and the first magnetic elementsurface 215 of the first magnetic element 210. Themagnetically-permeable element surface 205 is revealed from the frame110. The magnetically-permeable element 200 include amagnetically-permeable material, so that the magnetically-permeableelement 200 may be attracted to the first magnetic element 210 and thesecond magnetic element 220. A magnetically-permeable material means amaterial that has magnetic permeability. For example, amagnetically-permeable material may be a ferromagnetic material, such asFe, Ni, Co, and an alloy thereof.

Either of the first magnetic element 210 and the second magnetic element220 may be a magnet. The first magnetic element 210 includes a firstpair of magnetic poles. The first pair of magnetic poles includes anorth magnetic pole and a south magnetic pole (only illustrated in FIG.13 and FIG. 14 ) arranged along the second axis A2. The first magneticelement 210 includes a first magnetic element surface 215 facing themagnetically-permeable element 200, and the first magnetic elementsurface 215 is perpendicular to the second axis A2. The second magneticelement 220 includes a second pair of magnetic poles. The second pair ofmagnetic poles includes a north magnetic pole and a south magnetic pole(only illustrated in FIG. 13 and FIG. 14 ) arranged along the secondaxis A2. The second magnetic element 220 includes a second magneticelement surface 225 facing the magnetically-permeable element 200, andthe second magnetic element surface 215 is perpendicular to the secondaxis A2. It should be noted that, the arrangement direction of the northmagnetic pole and the south magnetic pole of the first pair of magneticpoles of the first magnetic element 210 is opposite to the arrangementdirection of the north magnetic pole and the south magnetic pole of thesecond pair of magnetic poles of the second magnetic element 220. Thearrangement of the magnetic poles may increase the generated magneticlines of force and strengthen the attractive force between the firstmagnetic element 210 and the second magnetic element 220 and themagnetically-permeable element 200 by circulation of magnetic field.

The first guidance element 230 and the second guidance element 240 arelocated on the first side 1001. The first guidance element 230 and thesecond guidance element 240 may have substantially the same structure.When viewed from the first axis A1, the area of the first guidanceelement 230 is substantially the same as that of the second guidanceelement 240. The first guidance element 230 and the second guidanceelement 240 may each have an elongated structure, such as a rod or astick. The first guidance element 230 and the second guidance element240 may extend in the first direction A1 and pass through at least partof the frame 110, the bottom 120, and the holder 130.

Next, please refer to FIG. 15 to FIG. 20 to know how the first guidanceelement 230 and the second guidance element 240 are received in theoptical mechanism 100. FIG. 15 to FIG. 18 are enlarged views of part ofthe optical mechanism 100, in which the perspectives and the omittedelements are not exactly the same. FIG. 19 and FIG. 20 arecross-sectional views of the optical mechanism 100 taken along the lineA-A and the line B-B of FIG. 6 , respectively. The guidance assembly Gincludes a first receiving portion 410, a second receiving portion 420,a third receiving portion 430, a fourth receiving portion 440, a fifthreceiving portion 450, and a sixth receiving portion 460. Foe ease ofdescription, the first receiving portion 410 to the sixth receivingportion 460 are referred to part of the guidance assembly G. However, itshould be noted that, the first receiving portion 410 to the sixthreceiving portion 460 are formed on the frame 110, the bottom 120, orthe holder 130. In detail, the first receiving portion 410 and thefourth receiving portion 440 are immovably disposed on the movable partM (the holder 130). The second receiving portion 420 and the fifthreceiving portion 450 are immovably disposed on the bottom 120. Thethird receiving portion 430 and the sixth receiving portion 460 areimmovably disposed on the frame 110.

The first receiving portion 410, the second receiving portion 420, andthe third receiving portion 430 receive the first guidance element 230,and each of them has a concave structure corresponding to the firstguidance element 230. The first receiving portion 410 and the secondreceiving portion 420 are arranged along the second axis A2. The firstreceiving portion 410 and the third receiving portion 430 are arrangedalong the second axis A2. The second receiving portion 420 and the thirdreceiving portion 430 are arranged along the first axis A1.

In some embodiments, the optical mechanism 100 further includes a firstadhesive element 510 (only schematically illustrated in FIG. 15 ). Thefirst guidance element 230 is immovably connected to the secondreceiving portion 420 via the first adhesive element 510, and the firstadhesive element 510 is in direct contact with the frame 110 and thebottom 120. In some embodiments, the minimum distance between the secondreceiving portion 420 and the first guidance element 230 is less thanthe minimum distance between the third receiving portion 430 and thefirst guidance element 230. That is, the second receiving portion 420 onthe bottom 120 is closer to the first guidance element 230 than thethird receiving portion 430 on the frame 110. In this way, it is easierfor the first adhesive element 510 to flow to the second receivingportion 420 on the bottom 120 from the third receiving portion 430 onthe frame 110. Also, when applying the first adhesive element 510 toaffix the first guidance element 230, the collision between the frame110 and the first guidance element 230 may be prevented, thepossibilities that the assembly does not follow an alignment correctlyare reduced, and assembling accuracy is enhanced.

The second receiving portion 420 and the third receiving portion 430include a second receiving portion recess 421 and a third receivingportion recess 431 for receiving the first adhesive element 510. Whenviewed from the first axis A1, the third receiving portion recess 431and the bottom 120 at least partially overlap. Also, the secondreceiving portion 420 includes a second receiving portion overflow-proofstructure 422 for receiving at least part of the first adhesive element510. When viewed from the first axis A1, the second receiving portionoverflow-proof structure 422 is close to the second receiving portionrecess 421. The third receiving portion 430 includes a third receivingportion overflow-proof structure 432 receiving at least part of thefirst adhesive element 510. When viewed from the first axis A1, thethird receiving portion overflow-proof structure 432 is close to thethird receiving portion recess 431. When viewed from the first axis A1,the second receiving portion overflow-proof structure 422 and the thirdreceiving portion overflow-proof structure 432 at least partiallyoverlap. That is, when applying the first adhesive element 510 to affixthe first guidance element 230, the second receiving portion recess 421and the third receiving recess 431 may increase the contact area betweenthe first adhesive element 510 and the bottom 130 and between the firstadhesive element 510 and the frame 110. Also, the second receivingportion overflow-proof structure 422 and the third receiving portionoverflow-proof structure 432 are able to receive part of the firstadhesive element 510, and thus the overflow of the first adhesiveelement 510 is prevented.

Similarly, the fourth receiving portion 440, the fifth receiving portion450, and the sixth receiving portion 460 receive the second guidanceelement 240, and each of them has a concave structure corresponding tothe second guidance element 240. The fourth receiving portion 440 andthe fifth receiving portion 450 are arranged along the second axis A2.The fourth receiving portion 440 and the sixth receiving portion 460 arearranged along the second axis A2. The fifth receiving portion 450 andthe sixth receiving portion 460 are arranged along the first axis A1.

In some embodiments, the optical mechanism 100 further includes a secondadhesive element 520 (only schematically illustrated in FIG. 1 ). Thesecond guidance element 240 is immovably connected to the fifthreceiving portion 450 via the second adhesive element 520, and thesecond adhesive element 520 is in direct contact with the frame 110 andthe bottom 120. In some embodiments, the minimum distance between thefifth receiving portion 450 and the second guidance element 240 is lessthan the minimum distance between the sixth receiving portion 460 andthe second guidance element 240. That is, the fifth receiving portion450 on the bottom 120 is closer to the second guidance element 240 thanthe sixth receiving portion 460 on the frame 110. In this way, it iseasier for the second adhesive element 520 to flow to the fifthreceiving portion 450 on the bottom 120 from the sixth receiving portion460 on the frame 110. Also, when applying the second adhesive element520 to affix the second guidance element 240, the collision between theframe 110 and the second guidance element 240 may be prevented, thepossibilities that the assembly does not follow an alignment correctlyare reduced, and assembling accuracy is enhanced.

The fifth receiving portion 450 and the sixth receiving portion 460include a fifth receiving portion recess 451 and a sixth receivingportion recess 461 for receiving the second adhesive element 520. Whenviewed from the first axis A1, the sixth receiving portion recess 461and the bottom 120 at least partially overlap. Also, the fifth receivingportion 450 includes a fifth receiving portion overflow-proof structure452 for receiving at least part of the second adhesive element 520. Whenviewed from the first axis A1, the fifth receiving portionoverflow-proof structure 452 is close to the fifth receiving portionrecess 451. The sixth receiving portion 460 includes a sixth receivingportion overflow-proof structure 462 receiving at least part of thesecond adhesive element 520. When viewed from the first axis A1, thesixth receiving portion overflow-proof structure 462 is close to thesixth receiving portion recess 461. When viewed from the first axis A1,the fifth receiving portion overflow-proof structure 452 and the sixthreceiving portion overflow-proof structure 462 at least partiallyoverlap. That is, when applying the second adhesive element 520 to affixthe second guidance element 240, the fifth receiving portion recess 451and the third receiving recess 431 may increase the contact area betweenthe second adhesive element 520 and the bottom 130 and between thesecond adhesive element 520 and the frame 110. Also, the secondreceiving portion overflow-proof structure 422 and the third receivingportion overflow-proof structure 432 are able to receive part of thesecond adhesive element 520, and thus the overflow of the secondadhesive element 520 is prevented.

It should be noted that, when viewed from the first axis A1, the firstreceiving portion 410 and the fourth receiving portion 440 havedifferent structures. For example, when viewed from the first axis A1,the first receiving portion 410 is V-shaped while the fourth receivingportion 440 is U-shaped. In other words, the fourth receiving portion440 includes a guidance surface 445 (only denoted in FIG. 12 ) facingthe second guidance element 240. The guidance surface 445 is flat. Theguidance surface 445 is in contact with the second guidance element 240.The guidance surface 445 is perpendicular to the second axis A2.Generally, the first guidance element 230 and the first receivingportion 410 that is V-shaped are closer than the second guidance element240 and the fourth receiving portion 440 that is U-shaped.

Also, the minimum distance between the first magnetic element 210 andthe magnetically-permeable element 200 in the second axis A2 is lessthan the minimum distance between the first guidance element 230 and themagnetically-permeable element 200 in the second axis A2. That is, thefirst magnetic element 210 is closer to the magnetically-permeableelement 200 than the first guidance element 230. Similarly, the secondmagnetic element 220 is closer to the magnetically-permeable element 200than the second guidance element 240 in the second axis A2. In this way,since the first magnetic element 210/the second magnetic element 220 iscloser to the magnetically-permeable element 200 than the first guidanceelement 230/the second guidance element 240, the attraction forcebetween the first magnetic element 210/the second magnetic element 220and the magnetically-permeable element 200 may be increased, and thespace is utilized effectively to achieve miniaturization.

Due to the attraction force between the first magnetic element 210 andthe magnetically-permeable element 200, the attraction force between thesecond magnetic element 220 and the magnetically-permeable element 200,and tight contact between the first guidance element 230/the secondguidance element 240 and the holder 130, the holder 130 may move in acertain dimension (e.g. the first axis A1), and unwanted shaking,rotating, or tilting of the holder 130 are prevented.

Next, in addition to FIG. 3 to FIG. 9 , please also refer to FIG. 21 andFIG. 22 to know the first circuit assembly C1, the second circuitassembly C2, the sensing assembly S, and the control assembly C. FIG. 21and FIG. 22 are perspective views of the optical mechanism 100, in whichthe omitted elements are trot exactly the same. When viewed from thefirst axis A1, the sensing assembly S is located on the second side1002. When viewed from the first axis A1, the first circuit assembly C1is located on the second side 1002. When viewed from the first axis A1,the external connection terminal 340 is located on the second side 1002.

The first circuit assembly C1 includes a plate structure that isperpendicular to the first axis A1. The first circuits 250 of the firstcircuit assembly C1 are located on a first imaginary plane, and thefirst imaginary plane is parallel with the first axis A1. As describedabove, the second circuit assembly C2 may be immovably disposed in thebottom 120 by insert molding. The second circuits 260 of the secondcircuit assembly C2 are located on a second imaginary plane, and thesecond imaginary plane is not parallel with the first imaginary plane.In addition, in this embodiment, the external connection terminal 340and at least part of the second circuit assembly C2 are integrallyformed as a complete piece. The current may be supplied into the opticalmechanism 100 via the external connection terminal 340. In particular,the external connection terminal 340 may be electrically connected to anexternal circuit outside the optical mechanism 100, and the externalconnection terminal 340 may include several pins.

The reference element 270 may be a magnetic element. The sensing element280 may be a Hall sensor, a Giant Magneto Resistance (GMR) sensor, aTunneling Magneto Resistance (TMR) sensor, etc. The reference element270 may be disposed at the movable part M. For example, the referenceelement 270 may be disposed on the holder 130. The sensing element 280may be disposed at the first circuit assembly C1 and electricallyconnected to the first circuit assembly C1. The sensing element 280 maydetect the reference element 270 to find out the position of the movablepart M. In particular, the sensing element 280 may detect the change ofthe lines of magnetic field (including but not limited to the density ofthe lines of magnetic field and the direction of the lines of magneticfield) of the reference element 270 to find out the position of theholder 130. Due to the sensing assembly S, the position of the movablepart M may be known in a short period of time.

As illustrated, the minimum distance between the sensing assembly S andthe first guidance element 230 is less than the minimum distance betweenthe sensing assembly S and the second guidance element 240. That is, thesensing assembly S is closer to the first guidance element 230 than thesecond guidance element 240. As described above, since the firstguidance element 230 and the first receiving portion 410 may be closerthan the second guidance element 240 and the fourth receiving portion440, placing the sensing assembly S closer to the first guidance element230 may enhance the sensing accuracy.

The drive assembly D may be controlled by the first control unit 290 andthe second control unit 300. The first drive element 140 and the seconddrive element 150 may be controlled separately. The first control unit290 that is packaged in the first package 310 outputs a first drivesignal to the first drive element 140. The second control unit 300 thatis packaged in the second package 320 outputs a second drive signal tothe second drive element 150. According to the position of the movablepart M sensed by the sensing assembly S, the first control unit 290 andthe second control unit 300 may control the drive signals to the firstdrive element 140 and the second drive element 150, respectively, toachieve closed-loop feedback. The first package 310 and the secondpackage 320 are independent, and a gap is formed between the firstpackage 310 and the second package 320. That is, the first package 310is not in contact with the second package 320.

The first package 310 is electrically connected to the external circuitvia the first circuit assembly C1 and the second circuit assembly C2sequentially. The second package 320 is electrically connected to theexternal circuit via the first circuit assembly C1 and the secondcircuit assembly C2 sequentially. The drive assembly D is electricallyconnected to the first package 310 and the second package 320 via thefirst circuit assembly C1 and the second circuit assembly C2sequentially. Since the first drive element 140 and the second driveelement 150 may be independently controlled, design flexibility isenhanced, and high stability and high accuracy may be achieved. However,in some other embodiments, there may be only one control unitcontrolling both the first drive element 140 and the second driveelement 150.

Next, please refer to FIG. 4 , FIG. 5 , FIG. 23 , and FIG. 24 to knowsome other features of the optical mechanism 100. FIG. 23 is an enlargedview of part of the optical mechanism 100. FIG. 24 is a cross-sectionalview of the optical mechanism 100 taken along the line C-C of FIG. 6 .

The frame 110 includes a first frame surface 111, a second frame surface112, and a third frame surface 113. The bottom 120 includes a firstbottom surface 121, a second bottom surface 122, a third bottom surface123, a fourth bottom surface 124, a fifth bottom surface 125, a firstopening 126, a second opening 127, and a third opening 128. The firstframe surface 111, the second frame surface 112, the first bottomsurface 121, the second bottom surface 122, the third bottom surface123, and the fourth bottom surface 124 are all perpendicular to thefirst axis A1.

The first frame surface 111, the second frame surface 112, and the thirdframe surface 113 face the bottom 120. The first bottom surface 121 andthe third bottom surface 123 face the frame 110. The second bottomsurface 122 and the first bottom surface 121 face in oppositedirections. For ease of illustration, a first direction D1 is defined,and the first direction D1 and the second bottom surface 122 face inopposite directions. For example, in FIG. 5 , the first direction D1 isthe direction that points inwards to the paper.

When viewed from the first axis A1, the minimum distance between thefirst frame surface 111 and the movable part M is less than the minimumdistance between the second frame surface 112 and the movable part M.That is, the first frame surface 111 is closer to the holder 130 thanthe second frame surface 112. In the first axis A1, the third bottomsurface 123 is located between the first bottom surface 121 and thefourth bottom surface 124. In the first axis A1, the minimum distancebetween the first bottom surface 121 and the third bottom surface 123 isless than the minimum distance between the first bottom surface 121 andthe fourth bottom surface 124. That is, in the first axis A1, the fourthbottom surface 124 is closer to the third bottom surface 123 than thefirst bottom surface 121.

The first frame surface 111 faces the third bottom surface 123, and thefirst frame surface 111 is parallel with the third bottom surface 123.The second frame surface 112 faces the fourth bottom surface 124, andthe second frame surface 112 is parallel with the fourth bottom surface124. The minimum distance between the first frame surface 111 and thethird bottom surface 123 is less than the minimum distance between thesecond frame surface 112 and the fourth bottom surface 124. That is, thefirst frame surface 111 and the third bottom surface 123 are closer thanthe second frame surface 112 and the fourth bottom surface 124. Also, asshown in FIG. 23 , the region on which the fourth bottom surface 124 islocated are thinner than the region on which the third bottom surface123 is located. Support via the third bottom surface 123 may be morestable. In some embodiments, there may be corresponding structures usedfor positioning formed between the first frame surface 111 and the thirdbottom surface 123.

In some embodiments, in a direction that is perpendicular to the firstbottom surface 121, the second bottom surface 122 and the drive assemblyD at least partially overlap. As shown in FIG. 5 , when viewed from thefirst direction, the second opening 127 is between the first opening 126and the third opening 128. When viewed from the first direction D1, atleast part of the drive assembly D is revealed from the first opening126, the second opening 127, and the third opening 128. For example,when viewed from the first direction D1, at least part of the firstdrive element fixing element 160 near the second side 1002, at leastpart of the first clamping portion 161, and at least part of the seconddrive element fixing element 170 near the second side 1002 are revealedfrom the first opening 126. For example, when viewed from the firstdirection D1, at least part of the first drive element 140 and at leastpart of the second drive element 150 are revealed from the secondopening 127. For example, when viewed from the first direction D1, atleast part of the first drive element fixing element 160 near the fourthside 1004, at least part of the second clamping portion 162, and atleast part of the second drive element fixing element 170 near thefourth side 1004 are revealed from the third opening 128.

In some embodiments, the optical mechanism 100 further includes a thirdadhesive element 530 (only schematically illustrated in FIG. 24 ). Thethird adhesive element 530 is disposed between the third frame surface113 and the fifth bottom surface 125, so that the frame 110 is connectedto the bottom 120 via the third adhesive element 530. The third framesurface 113 faces the fifth bottom surface 125, and the third framesurface 113 is not parallel with the fifth bottom surface 125. The thirdframe surface 113 or the fifth bottom surface 125 is parallel with thefirst axis A1. That is, one of the third frame surface 113 and the fifthbottom surface 125 is parallel with the first axis A1, and the other ofthe third frame surface 113 and the fifth bottom surface 125 is inclinedrelative to the first axis A1. Therefore, a space that is able toreceive the third adhesive element 530 may be formed between the thirdframe surface 113 and the fifth bottom surface 125 to strengthen theconnection between the frame 110 and the bottom 120.

It should be noted that, the first adhesive element 510, the secondadhesive element 520, and the third adhesive element 530 may includesame or different materials. The first adhesive element 510, the secondadhesive element 520, and the third adhesive element 530 may be anadhesive material, a conductive material, or an insulation material,such as resin or optical adhesives. Different elements may be adhered toeach other by the first adhesive element 510, the second adhesiveelement 520, and the third adhesive element 530. Furthermore, the firstadhesive element 510, the second adhesive element 520, and the thirdadhesive element 530 generally have good elasticity and good coveringability and thus the first adhesive element 510, the second adhesiveelement 520, and the third adhesive element 530 may protect theelements. Additionally, the first adhesive element 510, the secondadhesive element 520, and the third adhesive element 530 may reduce thepossibilities that particles such as dust or mist enter the elements. Ifthe first adhesive element 510, the second adhesive element 520, and thethird adhesive element 530 are made of an insulation material,insulation may be achieved. The connection between the elements may bestrengthened by the first adhesive element 510, the second adhesiveelement 520, and the third adhesive element 530. Therefore, thestructural strength of the overall optical mechanism 100 is increased.

As described above, the first drive element and the second drive elementmay be controlled separately, so that design flexibility is enhanced,and high stability and high accuracy may be achieved. Due to theattraction force between the first magnetic element and themagnetically-permeable element and the attraction force between thesecond magnetic element and the magnetically-permeable element, thefirst guidance element and the second guidance element may be in tightcontact with movable part. Due to the first guidance element and thesecond guidance element, the movable part may move in a certaindimension, and unwanted shaking, rotating, or tilting of the movablepart are prevented. Also, due to the sensing assembly, the position ofthe movable part is known instantly. According to the position of themovable part sensed by the sensing assembly, the first control unit andthe second control unit may control the drive signals to the first driveelement and the second drive element, respectively, to achieveclosed-loop feedback. Furthermore, to strengthen the connection betweenthe elements and to strengthen the mechanical strength of the overalloptical mechanism, there may be corresponding configuration between theelements such as corresponding shapes or corresponding structures, andthe adhesive element may be applied to the elements.

The foregoing outlines features of several embodiments so that thoseskilled in the art may better understand the aspects of this disclosure.Those skilled in the art should appreciate that they may readily usethis disclosure as a basis for designing or modifying other processesand structures for carrying out the same purposes and/or achieving thesame advantages of the embodiments introduced herein. Those skilled inthe art should also realize that such equivalent constructions do notdepart from the spirit and scope of this disclosure, and that they maymake various changes, substitutions, and alterations herein withoutdeparting from the spirit and scope of this disclosure. In addition, thescope of this disclosure is not limited to the specific embodimentsdescribed in the specification, and each claim constitutes a separateembodiment, and the combination of various claims and embodiments arewithin the scope of the disclosure.

What s claimed is:
 1. An optical mechanism, comprising: an immovablepart; a movable part connected to an optical element, wherein themovable part is movable relative to the immovable part; a drive assemblydriving the movable part to move relative to the immovable part; and aguidance assembly guiding the movable part to move along a first axis;wherein the immovable part comprises a frame, and the frame comprises areceiving space receiving the movable part; wherein the drive assemblycomprises: a first drive element comprising a first shape memory alloymaterial and a first elongated structure; and a second drive elementcomprising a second shape memory alloy material and a second elongatedstructure, wherein the movable part is driven by the drive assembly bychanging a first length of the first drive element and a second lengthof the second drive element; wherein the guidance assembly comprises: amagnetically-permeable element having a magnetically-permeable material;and a first magnetic element comprising a first pair of magnetic poles,wherein the first pair of magnetic poles comprises a north magnetic poleand a south magnetic pole that are arranged along a second axis, thefirst magnetic element comprises a first magnetic element surface thatfaces the magnetically-permeable element, and the first magnetic elementsurface is perpendicular to the second axis.
 2. The optical mechanism asclaimed in claim 1, wherein the guidance assembly further comprises asecond magnetic element comprising a second pair of magnetic poles;wherein the second pair of magnetic poles comprises a north magneticpole and a south magnetic pole that are arranged along the second axis,the second magnetic element comprises a second magnetic element surfacethat faces the magnetically-permeable element, and the second magneticelement surface is perpendicular to the second axis; wherein anarrangement direction of the north magnetic pole and the south magneticpole of the first pair of magnetic poles is opposite to an arrangementdirection of the north magnetic pole and the south magnetic pole of thesecond pair of magnetic poles.
 3. The optical mechanism as claimed inclaim 2, wherein the frame comprises a plastic material, themagnetically-permeable element is immovably disposed on the frame, andat least part of the magnetically-permeable element is embedded in theframe and not revealed from the frame.
 4. The optical mechanism asclaimed in claim 2, wherein the frame comprises a fixing elementaffixing the magnetically-permeable element, wherein themagnetically-permeable element comprises an opening corresponding to thefixing element, the magnetically-permeable element comprises amagnetically-permeable element surface facing the first magneticelement, and the magnetically-permeable element surface is revealed fromthe frame.
 5. The optical mechanism as claimed in claim 4, wherein thedrive assembly further comprises: a first clamping portion fixing afirst end of the first drive element; and a second clamping portionfixing a second end of the first drive element; wherein themagnetically-permeable element surface of the magnetically-permeableelement faces the first drive element, and the first drive element islocated between the magnetically-permeable element surface of themagnetically-permeable element and the first magnetic element surface ofthe first magnetic element.
 6. The optical mechanism as claimed in claim1, wherein the first elongated structure of the first drive element isdifferent from the second elongated structure of the second driveelement.
 7. The optical mechanism as claimed in claim 6, wherein thefirst drive element is V-shaped and the second drive element isreverse-V-shaped.
 8. The optical mechanism as claimed in claim 5,wherein the immovable part further comprises a bottom immovablyconnected to the frame, and the bottom comprises: a first bottom surfacefacing the frame and perpendicular to the first axis; a second bottomsurface facing a direction that is opposite to which the first bottomsurface faces, wherein the second bottom surface and a first directionface in opposite directions; a first opening, wherein when viewed fromthe first direction, at least part of the first clamping portion isrevealed from the first opening; a second opening, wherein when viewedfrom the first direction, at least part of the first drive element isrevealed from the second opening; and a third opening, wherein whenviewed from the first direction, at least part of the second clampingportion is revealed from the third opening; wherein in a direction thatis perpendicular to the first bottom surface, the second bottom surfaceand the drive assembly at least partially overlap; wherein when viewedfrom the first direction, the second opening is located between thefirst opening and the third opening.
 9. The optical mechanism as claimedin claim 2, wherein the guidance assembly further comprises: a firstguidance element having a third elongated structure extending along thefirst axis; a first receiving portion having a concave structurecorresponding to the first guidance element; a second receiving portionhaving a concave structure corresponding to the first guidance elementand extending along the first axis; and a third receiving portion havinga concave structure corresponding to the first guidance element andextending along the first axis; wherein the first receiving portion andthe second receiving portion are arranged along the second axis, and thesecond receiving portion and the third receiving portion are arrangedalong the first axis.
 10. The optical mechanism as claimed in claim 9,wherein a minimum distance between the second receiving portion and thefirst guidance element is less than a minimum distance between the thirdreceiving portion and the first guidance element.
 11. The opticalmechanism as claimed in claim 9, wherein a minimum distance between thefirst magnetic element and the magnetically-permeable element in thesecond axis is less than a minimum distance between the first guidanceelement and the magnetically-permeable element in the second axis. 12.The optical mechanism as claimed in claim 9, wherein the immovable partfurther comprises a bottom immovably connected to the frame, the firstreceiving portion is immovably disposed on the movable part, the secondreceiving portion is immovably disposed on the bottom, and the thirdreceiving portion is immovably disposed on the frame.
 13. The opticalmechanism as claimed in claim 12, wherein the optical mechanism furthercomprises a first adhesive element, the first guidance element isimmovably connected to the second receiving portion via the firstadhesive element, and the first adhesive element is in direct contactwith the frame and the bottom, wherein the second receiving portion andthe third receiving portion having a second receiving portion recess anda third receiving portion recess, respectively, and when viewed from thefirst axis, the third receiving portion recess and the bottom at leastpartially overlap.
 14. The optical mechanism as claimed in claim 13,wherein the second receiving portion comprises a second receivingportion overflow-proof structure receiving at least part of the firstadhesive element, and when viewed from the first axis, the secondreceiving portion overflow-proof structure is close to the secondreceiving portion recess, wherein the third receiving portion comprisesa third receiving portion overflow-proof structure receiving at leastpart of the first adhesive element, and when viewed from the first axis,the third receiving portion overflow-proof structure is close to thethird receiving portion recess, wherein when viewed from the first axis,the second receiving portion overflow-proof structure and the thirdreceiving portion overflow-proof structure at least partially overlap.15. The optical mechanism as claimed in claim 9, wherein the guidanceassembly further comprises: a second guidance element having a fourthelongated structure extending along the first axis; a fourth receivingportion having a concave structure corresponding to the second guidanceelement; a fifth receiving portion having a concave structurecorresponding to the second guidance element and extending along thefirst axis; and a sixth receiving portion having a concave structurecorresponding to the second guidance element and extending along thefirst axis; wherein a minimum distance between the fifth receivingportion and the second guidance element is less than a minimum distancebetween the sixth receiving portion and the second guidance element. 16.The optical mechanism as claimed in claim 15, wherein the immovable partfurther comprises a bottom immovably connected to the frame, the fourthreceiving portion is immovably disposed on the movable part, the fifthreceiving portion is immovably disposed on the bottom, and the sixthreceiving portion is immovably disposed on the frame.
 17. The opticalmechanism as claimed in claim 15, wherein the optical mechanism furthercomprises a second adhesive element, and the second guidance element isimmovably connected to the fifth receiving portion via the secondadhesive element.
 18. The optical mechanism as claimed in claim 15,wherein when viewed from the first axis, the first receiving portion andthe fourth receiving portion have different structures, wherein thefourth receiving portion comprises a guidance surface facing the secondguidance element, the guidance surface is a flat surface, the guidancesurface is in contact with the second guidance element, and the guidancesurface is perpendicular to the second axis.
 19. The optical mechanismas claimed in claim 15, wherein the first receiving portion is V-shaped,and the fourth receiving portion is U-shaped.
 20. An optical system,comprising: the optical mechanism as claimed in claim 1, wherein whenviewed from a direction of an incident light, the movable part iscompletely revealed from the immovable part; a case having a top walland a side wall, wherein the top wall is not parallel with the sidewall, and the top wall restricts movement range of the movable part; abase, wherein an accommodating space accommodating the optical mechanismis formed by the case and the base; and a drive module driving theoptical mechanism to move relative to the case.